<template>
  <div ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>

import BScroll from "better-scroll";

export default {
  name: "Scroll",
  data() {
    return {
      scroll: null
    }
  },
  props: {
    probeType: {
      type: Number,
      default() {
        return 1
      }
    },
    pullUpLoad: {
      type: Boolean,
      default: false
    }
  },
  mounted() {
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true,
      probeType: this.probeType,
      pullUpLoad: this.pullUpLoad
    })
    // 监听滚动的位置
    if ( this.probeType === 2 || this.probeType === 3) {
      this.scroll.on('scroll' , position => {
        // console.log(position);
        this.$emit('scroll' , position)
      })
    }
    // 监听是否滚动到底部
    if (this.pullUpLoad) {
      this.scroll.on('pullingUp' , () => {
        // console.log('监听到滚动底部');
        this.$emit('pullingUp')
      })
    }
  },
  methods: {
    scrollTo(x , y , time = 300) {
      this.scroll && this.scroll.scrollTo(x , y , time)
    },
    finishPullUp() {
      this.scroll && this.scroll.finishPullUp()
    },
    refresh() {
      // console.log('----------');
      this.scroll && this.scroll.refresh()
    },
    getScrollY() {
      return this.scroll ? this.scroll.y : 0
    }
  },
  watch: {
    data() {
      setTimeout(this.refresh, 20)
    }
  }
}
</script>

<style scoped>

</style>
